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Editing: patcomp.cpython-39.pyc
a XC?h� � @ s� d Z dZddlZddlmZmZmZmZmZm Z ddl m Z ddl m Z G dd � d e �Zd d � ZG d d � d e�Zejejejdd�Zdd� Zdd� Zdd� ZdS )z�Pattern compiler. The grammar is taken from PatternGrammar.txt. The compiler compiles a pattern to a pytree.*Pattern instance. z#Guido van Rossum <guido@python.org>� N� )�driver�literals�token�tokenize�parse�grammar)�pytree)�pygramc @ s e Zd ZdS )�PatternSyntaxErrorN)�__name__� __module__� __qualname__� r r �4/opt/alt/python39/lib64/python3.9/lib2to3/patcomp.pyr s r c c sL t jt jt jh}t�t�| �j�}|D ] }|\}}}}}||vr&|V q&dS )z6Tokenizes a string suppressing significant whitespace.N) r �NEWLINE�INDENT�DEDENTr �generate_tokens�io�StringIO�readline) �input�skip�tokensZ quintuple�type�value�start�endZ line_textr r r �tokenize_wrapper s r c @ s: e Zd Zd dd�Zddd�Zdd� Zdd d �Zd d � ZdS )�PatternCompilerNc C sZ |du rt j| _t j| _nt�|�| _t �| j�| _t j| _ t j | _ tj | jt d�| _dS )z^Initializer. Takes an optional alternative filename for the pattern grammar. N)Zconvert)r Zpattern_grammarr Zpattern_symbols�symsr Z load_grammarZSymbolsZpython_grammarZ pygrammarZpython_symbols�pysymsZDriver�pattern_convert)�selfZ grammar_filer r r �__init__( s zPatternCompiler.__init__Fc C sr t |�}z| jj||d�}W n4 tjyP } ztt|��d�W Y d}~n d}~0 0 |rd| �|�|fS | �|�S dS )z=Compiles a pattern string to a nested pytree.*Pattern object.)�debugN)r r Z parse_tokensr Z ParseErrorr �str� compile_node)r$ r r& Z with_treer �root�er r r �compile_pattern7 s $z PatternCompiler.compile_patternc s� |j � jjkr|jd }|j � jjkrz� fdd�|jddd� D �}t|�dkrX|d S tjdd� |D �ddd�}|�� S |j � jj krʇ fd d�|jD �}t|�dkr�|d S tj|gddd�}|�� S |j � jj kr�� � |jdd� �}t� |�}|�� S |j � jj k�sJ �d}|j}t|�d k�rR|d j tjk�rR|d j}|dd� }d}t|�dk�r�|d j � jjk�r�|d }|dd � }� � ||�}|du�r�|j � jjk�s�J �|j} | d } | j tjk�r�d} tj} n�| j tjk�r�d} tj} np| j tjk�r^| d j tjk�s J �t| �d v �s.J �� �| d � } } t| �d k�rh� �| d �} n d�shJ �| dk�s|| dk�r�|�� }tj|gg| | d�}|du�r�||_|�� S )zXCompiles a node, recursively. This is one big switch on the node type. r c s g | ]}� � |��qS r �r( ��.0Zch�r$ r r � <listcomp>O � z0PatternCompiler.compile_node.<locals>.<listcomp>N� r c S s g | ] }|g�qS r r )r. �ar r r r0 R r1 ��min�maxc s g | ]}� � |��qS r r, r- r/ r r r0 V r1 � ���)r7 � r9 F)r r! ZMatcher�childrenZ Alternatives�lenr �WildcardPattern�optimizeZ AlternativeZ NegatedUnit� compile_basicZNegatedPatternZUnitr �EQUALr ZRepeater�STARZHUGE�PLUS�LBRACE�RBRACE�get_int�name) r$ �nodeZalts�pZunits�patternrE �nodes�repeatr: �childr5 r6 r r/ r r( C sh " z PatternCompiler.compile_nodec C sn t |�dksJ �|d }|jtjkrDtt�|j��}t� t |�|�S |jtj k�r|j}|� � r�|t vrttd| ��|dd � r�td��t� t | �S |dkr�d }n,|�d�s�t| j|d �}|d u r�td| ��|dd � r�| �|d jd �g}nd }t�||�S nV|jdk�r | �|d �S |jd k�r\|d u �s:J �| �|d �}tj|ggddd �S d �sjJ |��d S ) Nr r zInvalid token: %rz Can't have details for token�any�_zInvalid symbol: %r�(�[r4 F)r; r r �STRINGr' r Z evalStringr r Z LeafPattern�_type_of_literal�NAME�isupper� TOKEN_MAPr � startswith�getattrr" r( r: Z NodePatternr< )r$ rI rJ rF r r Zcontent� subpatternr r r r> � s< z PatternCompiler.compile_basicc C s |j tjksJ �t|j�S �N)r r �NUMBER�intr )r$ rF r r r rD � s zPatternCompiler.get_int)N)FF)N)r r r r% r+ r( r> rD r r r r r & s G #r )rR rP rY ZTOKENc C s. | d � � rtjS | tjv r&tj| S d S d S )Nr )�isalphar rR r Zopmap)r r r r rQ � s rQ c C s> |\}}}}|s|| j v r*tj|||d�S tj|||d�S dS )z9Converts raw node information to a Node or Leaf instance.)�contextN)Z number2symbolr ZNodeZLeaf)r Z raw_node_infor r r\ r: r r r r# � s r# c C s t � �| �S rX )r r+ )rH r r r r+ � s r+ )�__doc__� __author__r Zpgen2r r r r r r � r r � Exceptionr r �objectr rR rP rY rT rQ r# r+ r r r r �<module> s" �
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